Current direction, chemical, benthic organisms, and other data from moored current meter casts and other instruments in the Gulf of Mexico during the Brine Disposal project, 1981-01-21 to 1982-07-27 (NODC Accession 8200207)

Current direction, chemical, benthic organisms, and other data were collected using moored current meter casts and other instruments in the Gulf of Mexico from January 21, 1981 to July 27, 1982. Data were submitted by Texas A&M University as part of the Brine Disposal project. Data has been been processed by NODC to the NODC standard F005- Current Meter Data, F004- Water Physics and Chemistry, and F132- Benthic Organisms formats. Full format and format code descriptions are available at http://www.nodc.noaa.gov/General/NODC-datafmts.html.

The F004 format is used for data from measurements and analyses of physical and chemical characteristics of the water column. Among chemical parameters that may be recorded are salinity, PH, and concentration of oxygen, ammonia, nitrate, phosphate, chlorophyll, and suspended solids. Physical parameters that may be recorded include temperature, density (sigma-t), transmissivity, and current velocity (east-west and north-south components). Cruise and station information, including environmental conditions of the study site at the time of observations, is also included.

The F005 format is used for time series measurements of ocean currents obtained using moored current-measuring instruments, principally Aanderaa current meters (manufactured by Aanderaa Instruments Inc.). These data represent the Eulerian method of current measurement, i.e., the meters are deployed at a fixed mooring point and measure flow past the sensor. Position, water depth, and sensor depth are reported for each station. The data record comprises values of current direction and speed at specified date and time. Data values may be subject to averaging or filtering and are typically reported at 10-15 minute time intervals. Other environmental parameters may also be reported. These include: water temperature, salinity, conductivity, and transmissivity; wind direction and speed; and dominant wave direction, height, and period. A text field is available for optional comments.

The F132 format contains data from field sampling or surveys of bottom dwelling marine organisms. The data provide information on species abundance, distribution, and biomass; they may have been collected by point sampling (grab or core), by tow (dredge, trawl or net), by photographic surveys, or by other methods. Cruise information such as vessel, start and end dates, investigator, and institution/agency; station numbers, positions and times; and equipment and methods are reported for each survey. Environmental data reported at each sampling site may include meteorological and sea surface conditions; surface and bottom temperature, salinity and dissolved oxygen; and sediment characteristics. Number of individual organisms and total weight of organisms is reported for each species. A text record is available for comments.

本数据集于1981年1月21日至1982年7月27日期间，在墨西哥湾通过锚定海流计投放及其他仪器手段，收集了海流方向、化学、底栖生物及其他相关数据。该数据集由德克萨斯农工大学（Texas A&M University）作为盐水处置项目（Brine Disposal project）的一部分提交。美国国家海洋数据中心（National Oceanographic Data Center, NODC）已将数据按照其标准格式进行处理：F005-海流计数据、F004-水体物理与化学数据以及F132-底栖生物数据。完整的格式及格式代码说明可访问http://www.nodc.noaa.gov/General/NODC-datafmts.html获取。

F004格式用于存储水柱物理与化学特征的测量与分析数据。可记录的化学参数包括盐度、pH值、溶解氧、氨、硝酸盐、磷酸盐、叶绿素以及悬浮颗粒物浓度。可记录的物理参数包括温度、密度（σ-t）、透射率以及海流速度（东西向与南北向分量）。此外，数据集还包含航次与测站信息，如观测时研究区域的环境条件。

F005格式用于存储通过锚定海流测量仪器（主要为安德雷亚海流计，由Aanderaa Instruments Inc.制造）获取的海流时间序列数据。此类数据采用欧拉海流测量法，即仪器部署于固定锚泊点，测量流经传感器的流体。每个测站均会报告站位位置、水深以及传感器深度。数据记录包含指定日期与时间下的海流方向与速度数值，数据通常经过平均或滤波处理，时间间隔一般为10至15分钟。此外还可报告其他环境参数，包括水温、盐度、电导率、透射率；风向与风速；以及主波向、波高与波周期。数据集预留文本字段用于填写可选备注。

F132格式包含底栖海洋生物的野外采样或调查数据。此类数据提供物种丰度、分布与生物量相关信息，采集方式可分为点位采样（抓斗或岩心采样）、拖网作业（疏浚、拖网或网具）、摄影调查或其他方法。每个调查项目均会报告航次信息，包括作业船舶、起止日期、调查人员以及所属机构；测站编号、位置与时间；以及所用设备与方法。每个采样点还会报告环境数据，包括气象与海面状况；表层与底层水温、盐度及溶解氧；以及沉积物特征。数据集会报告各物种的个体总数与生物总重量，并预留文本记录字段用于填写备注。